720p (HD) at 120 fps with H.264 (AVC): What You Need to Know
Whether you are a streamer, filmmaker, or content creator, working with 720p (HD) at 120 fps using H.264 (AVC) encoding comes with specific storage and bandwidth considerations.
While 720p is no longer the gold standard, it remains a practical choice for bandwidth-limited environments and platforms that prioritize smooth playback over pixel density. This resolution is particularly favored by educators and webinar hosts.
Recording at 120fps is primarily used for creating smooth slow-motion effects. When played back at 30fps, you get a beautiful 4× slow-motion effect that reveals details invisible to the naked eye.
The H.264 (AVC) codec offers universal hardware and software compatibility across all devices, browsers, and platforms. As the baseline codec, H.264 produces the largest files among modern streaming codecs but guarantees playback on virtually every device manufactured in the last decade.
With these settings, a 10-minute clip weighs approximately 1.41 GB, while a full hour reaches 8.44 GB. You will need a minimum upload speed of 30.2 Mbps for reliable streaming. The total video bitrate for this configuration is 20.0 Mbps.